These guys just like Vasto Lordes, seemed like they were something to be reckoned with, and yet while strong .. they just weren't that strong or really impressive. I mean aside from Hollow powers, these people trained for years an years just to get back at Aizen, and yet after all that and those Hollow powers ... they pretty much aren't that much stronger from other Cpt.'s and were still easily taken down by Aizen & Co.